36 Transactions. 
IIT. A Geological Sketch of Annandale. 
By Mr Grorce JouNsTOoNeE. 
The Chairman read this communication, in which the author 
made particular reference to the northern portion of the district 
referred to in the title, and illustrated his remarks by a chart 
showing the different rock formations. The district is, said the 
writer, about twenty miles in length, and about eight in breadth, 
and is surrounded on three sides—N., E., and W.—by hills of 
Silurian origin. Within this area the Silurian rocks appear 
frequently at the surface—i.e., along the banks of the Annan and 
its tributaries. The dip of the rock is generally about 80 deg., 
while at one place in the River Milk it is almost perpendicular. 
The Old Red Sandstone is found in the Burnswark group of 
hills, extending about five miles in length and about three-quarters 
of a mile in breadth. This rock is remarkable for the great 
quantities of white pebbles which it contains, and is similar in 
appearance to the Old Red Sandstone found on the shores of the 
Firth of Clyde. Burnswark itself is of volcanic origin. All 
the hills possess the peculiar rounded appearance of the glacial 
action, and the smaller elevations in the valleys show, where 
sections have been made, the unmistakable evidence of the 
boulder clay. 
Summer Programme.—This being the last meeting of the 
Session, the following programme of the Field Meetings was sub- 
mitted by the Secretary and adopted :—May—To Wood Castle, 
Spedlins Tower, Corncockle Quarry, and Raehills Glen. June— 
To Calkerbush, Southwick, and Douglas Hall. July — To 
Moniaive by Dunscore, returning by Barjarg lime-stone quarries. 
August—Neighbourhood of Moffat. September—Dornock, Kel- 
head, returning by Lochmaben. It was reported that the follow- 
ing members would, in connection with the excursions, prepare 
information for the members, or describe the places, &c., visited, 
viz.:—Dr Gilchrist, in Geology; Mr Wilson, Botany; Mr Barbour 
and Mr J. Lennox, Archeology; Mr Maxwell, Fungi; Mr 
Lennon, Entomology; Mr Davidson, Mineralogy; and Mr 
Chrystie, Ornithology. 
